have a 2010 tc ss w/ gms1, hahn intake, dejon cp w/ hks bov. the weather is about 33-40 degrees where im at. recently noticed the car would jerk oddly once or twice after shifting into gears. check my a/f ratio guage and the needle is jumping from 12 to 16 and sometimes 18 after shifting into gear, espically 2-4 gear. the issue has been going on for about 5 days now and i want to get your input on what it maybe or how i can reslove it. thanks for any help & advice

 

12 a/f is really rich for gms1 and its normal to swing way lean during shifts

 

Maybe a fried front 02 sensor? Just a guess..

 

Take alk ure aftermarjet off and put stockr **** back on if ure not tuned for it

 

Totally missed the bov. Yup that will do it

 

take all the aftermarket stuff off or just the bov?

 

bov. Get a block off plate. Do you still have the factory bpv or did you block that off?

 

ok so take the bov off until i can get a tune for the bov? is it ok to leave the bov discennected in place of the cp so i can at least keep the piping?

 

i didnt buy the block off plate... i went thru the dejon pipe thread install and just followed all the instructions & bypassed it i believe

 

You would think it would run pig rich with BOV not tuned in. Metered air vanishes...so ECU thinks there's more air than there really is?

 

OP you should have an engine light on. Correct? How long have you had the bov on the car?

 

maybe putting a bov on a recirc car???

 

yes.. cel has beeen on for 4 days and the bov has been on for maybe a week & half... do u suggest just removing the vac line from the bov so its not opperable?

 

I'm stock and mine goes as low as 11

 

its weird though... ill be cruising at 30 or 40 and the car will pull for a sec or two w/o me giving it any more gas

 

bov blew the welds on the im

 

for now should i just diconnect bov?

 

Is the stock bypass valve still there and hooked up?

 

the bpv is still there & hooked up

 

take ur foot off the gas once, it will go up to 30. lol i dont think there is a problem, when u lift ur foot off the gas it will go lean. drive down the highway, giver a little and take ur foot all the way off the gas, it will go up to 30. its normal

 

what will go up to 30?